updated for version 7.4.607
Problem:    Compiler warnings for unused variables.
Solution:   Move them inside #ifdef. (Kazunobu Kuriyama)
diff --git a/src/version.c b/src/version.c
index 72d85b6..1c4693f 100644
--- a/src/version.c
+++ b/src/version.c
@@ -742,6 +742,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    607,
+/**/
     606,
 /**/
     605,